What is CVE-2026-69276?

CVE-2026-69276 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft UxTheme Library (uxtheme.dll) Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-69276 cover?

CVE-2026-69276 covers the following CVE IDs: CVE-2026-69276. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-69276?

CVE-2026-69276 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-69276?

CVE-2026-69276 affects 30 products, including: Windows 10 Version 1607 for 32-bit Systems; Windows 10 Version 1607 for x64-based Systems; Windows 10 Version 1809 for 32-bit Systems; Windows 10 Version 1809 for x64-based Systems; Windows 10 Version 21H2 for 32-bit Systems; and others — see the full list on the advisory page.

CVE-2026-69276HighCVSS 9.8

Microsoft UxTheme Library (uxtheme.dll) Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

September 11, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-69276 →

📋 Description

Integer underflow (wrap or wraparound) in Microsoft UxTheme Library (uxtheme.dll) allows an unauthorized attacker to execute code over a network.

🎯 Affected products30

Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 21H2 for 32-bit Systems
Windows 10 Version 21H2 for ARM64-based Systems
Windows 10 Version 21H2 for x64-based Systems
Windows 10 Version 22H2 for 32-bit Systems
Windows 10 Version 22H2 for ARM64-based Systems
Windows 10 Version 22H2 for x64-based Systems
Windows 11 Version 23H2 for ARM64-based Systems
Windows 11 Version 23H2 for x64-based Systems
Windows 11 Version 24H2 for ARM64-based Systems
Windows 11 Version 24H2 for x64-based Systems
Windows 11 Version 25H2 for ARM64-based Systems
Windows 11 Version 25H2 for x64-based Systems
Windows 11 Version 26H1 for ARM64-based Systems
Windows 11 version 26H1 for x64-based Systems
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)
Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows Server 2025
Windows Server 2025 (Server Core installation)

✅ Remediation

KB5122876 (Security Update) — fixed build 10.0.17763.9245 KB5122882 (Security Update) — fixed build 10.0.20348.5622 KB5122878 (Security Update) — fixed build 10.0.19044.7725 KB5122878 (Security Update) — fixed build 10.0.19045.7725 KB5122871 (Security Update) — fixed build 10.0.26100.33438 KB5124008 (Security Update) — fixed build 10.0.26200.9445 KB5122880 (Security Update) — fixed build 10.0.22631.7582 KB5124008 (Security Update) — fixed build 10.0.26100.9445 KB5124012 (Security Update) — fixed build 10.0.28000.2954 KB5123099 (Security Update) — fixed build 10.0.14393.9512 KB5123065 (Monthly Rollup) — fixed build 6.2.9200.26349 KB5123066 (Monthly Rollup) — fixed build 6.3.9600.23397

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products30

✅ Remediation

🔗 References (21)